公开(公告)号：US20230240143A1

公开(公告)日：2023-07-27

申请号：US18071238

申请日：2022-11-29

Applicant: TDK CORPORATION

Inventor： Shuto ONO ,  Satoshi SASAKI ,  Yasuyuki SATOH ,  Keiji OGUCHI

IPC: H02K29/00

CPC classification number: H10N30/20 ,  H10N30/87 ,  H10N30/88

Abstract: A piezoelectric actuator includes a piezoelectric element having a rectangular shape, a first supporter, and a second supporter. The piezoelectric element includes a pair of main surfaces opposing each other, a first end surface and a second end surface opposing each other in a long side direction of the pair of main surfaces, and a first side surface and a second side surface opposing each other in a short side direction of the pair of main surfaces. The first supporter is provided to be movable according to deformation of the first end surface. The second supporter is provided to be movable according to deformation of the first side surface. The first supporter includes an opposing portion and a protruding portion. The opposing portion opposes the second supporter in the long side direction. The protruding portion protrudes from the opposing portion and abuts on the second supporter.

公开(公告)号：US20150340589A1

公开(公告)日：2015-11-26

申请号：US14720062

申请日：2015-05-22

Applicant: TDK Corporation

Inventor： Yasuyuki SATOH ,  Keisuke ITAKURA ,  Jun SUGAWARA

IPC: H01L41/083 ,  H01L41/047

CPC classification number: H01L41/0836 ,  H01L41/0471 ,  H01L41/083

Abstract: A multilayer piezoelectric device comprises a multilayer body and first and second outer electrodes. The multilayer body has base, first and second driving parts, and non-driving part. The driving parts and non-driving part extend from the base along stacking direction. The first driving part is closer to the non-driving part than the second driving part. Each driving part has first and second inner electrodes opposing each other in stacking direction. The base has a third inner electrode extending along a plane orthogonal to the stacking direction. The first outer electrode is connected to the first inner electrode. The second outer electrode is connected to the second and third inner electrodes. In the stacking direction, the overlap area of the third and second inner electrode of the first driving part is greater than the overlap area of the third and second inner electrode of the second driving part.

Abstract translation: 一种多层压电器件包括多层体和第一和第二外电极。 多层体具有基部，第一和第二驱动部以及非驱动部。 驱动部件和非驱动部件从底座沿堆叠方向延伸。 第一驱动部比第二驱动部更靠近非驱动部。 每个驱动部分具有在堆叠方向上彼此相对的第一和第二内部电极。 底座具有沿垂直于层叠方向的平面延伸的第三内电极。 第一外部电极连接到第一内部电极。 第二外部电极连接到第二和第三内部电极。 在堆叠方向上，第一驱动部的第三和第二内部电极的重叠面积大于第二驱动部的第三和第二内部电极的重叠面积。

公开(公告)号：US20180219494A1

公开(公告)日：2018-08-02

申请号：US15884785

申请日：2018-01-31

Applicant: TDK CORPORATION

Inventor： Yasuyuki SATOH ,  Katsumi YAMAUCHI ,  Katsuya INABA ,  Yoko ABE

IPC: H02N2/00 ,  H01L41/047

CPC classification number: H02N2/0015 ,  H01L41/047 ,  H01L41/0471 ,  H01L41/0472 ,  H01L41/083 ,  H01L41/293

Abstract: A piezoelectric actuator (1) includes: a piezoelectric element (3); and a first frictional portion (10) and a second frictional portion (12) that are disposed on one principal surface (2d) of the piezoelectric element (3). The first frictional portion (10) is disposed at a position other than the antinodes of the piezoelectric element (3) at which a distance from one of the end surfaces (2a) is less than ⅓ L, where L represents a length in the longitudinal direction of the piezoelectric element (3). The second frictional portion (12) is disposed at a position other than the antinodes of the piezoelectric element (3) at which a distance from the other of the end surfaces (2b) is less than ⅓ L.

公开(公告)号：US20220278266A1

公开(公告)日：2022-09-01

申请号：US17625558

申请日：2020-10-07

Applicant: TDK CORPORATION

Inventor： Satoshi MIYAZAKI ,  Yasuyuki SATOH ,  Keiji OGUCHI

IPC: H01L41/04 ,  H01L41/047 ,  H01L41/083

Abstract: A laminated piezoelectric element has excellent suppression effect on characteristics deterioration caused by a pyroelectric effect. Inside an element main body are a first internal electrode, a piezoelectric layer, and a second internal electrode that has different polarity from the first internal electrode, which are repeatedly layered a plurality of times along the lamination direction. A first external electrode is formed on a first side surface of the element main body. A second external electrode is formed on a second side surface of the element main body. A resistance layer connected to the internal electrodes is formed in at least part of a third side surface of the element main body in which the internal electrodes are exposed. An insulating layer is formed on a third side of the element main body so as to cover the resistance layer.

公开(公告)号：US20240074320A1

公开(公告)日：2024-02-29

申请号：US18454341

申请日：2023-08-23

Applicant: TDK CORPORATION

Inventor： Shuto ONO ,  Satoshi SASAKI ,  Yasuyuki SATOH ,  Keiji OGUCHI

IPC: H10N30/87

CPC classification number: H10N30/87

Abstract: A piezoelectric element includes a piezoelectric body and first, second, third, and fourth electrode layers disposed in the piezoelectric body. Each of the first, second, third, and fourth electrode layers includes a pair of first electrodes and a pair of second electrodes. The first and second electrodes included in the first electrode layer oppose the second and first electrodes included in the second electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the second electrode layer oppose the first and second electrodes included in the third electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the third electrode layer oppose the second and first electrodes included in the fourth electrode layer, respectively, with a part of the piezoelectric body.

公开(公告)号：US20220209099A1

公开(公告)日：2022-06-30

申请号：US17559245

申请日：2021-12-22

Applicant: TDK CORPORATION

Inventor： Keiji OGUCHI ,  Yasuyuki SATOH ,  Satoshi SASAKI

IPC: H01L41/312 ,  H01L41/047

Abstract: A piezoelectric element includes a laminate and a first internal electrode. The laminate includes a pair of main faces, a pair of end faces, and a pair of side faces. The first internal electrode includes four electrode portions and a connector. The four electrode portions include a first pair of electrode portions and a second pair of electrode portions. The connector connects the first pair of electrode portions. The connector is spaced apart from each of the second pair of electrode portions by a first distance. Each of the four electrode portions includes a main electrode part. The main electrode part is spaced apart from the pair of end faces by a second distance. The main electrode part is spaced apart from the pair of side faces by a third distance. The first distance is longer than each of the second distance and the third distance.

公开(公告)号：US20220209097A1

公开(公告)日：2022-06-30

申请号：US17559223

申请日：2021-12-22

Applicant: TDK CORPORATION

Inventor： Keiji OGUCHI ,  Yasuyuki SATOH ,  Satoshi SASAKI

IPC: H01L41/083 ,  H01L41/047

Abstract: A piezoelectric element includes a laminate, a plurality of internal electrodes, and a plurality of external electrodes. The laminate includes a plurality of piezoelectric layers that is laminated. The laminate includes a pair of main faces facing away from each other in a laminating direction of the plurality of piezoelectric layers, a pair of end faces facing away from each other in a first direction crossing the laminating direction, and a pair of side faces facing away from each other in a second direction crossing the laminating direction and the first direction. The plurality of internal electrodes is disposed in the laminate to be laminated in the laminating direction. Each of the pair of main faces, the pair of end faces, and the pair of side faces is a polished surface that is polished. Each ridge portion of the laminate has a rounded chamfered shape.